ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,643, issued on May 26, was assigned to PROMOS TECHNOLOGIES INC. (Hsinchu, Taiwan).
"Photonic integrated circuit structure" was invented by Ping Ming Liu (Hsinchu, Taiwan) and Hsiao Che Wu (Hsinchu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A photonic integrated circuit structure includes a substrate, a waveguide structure and a spot size converter. The waveguide structure is disposed over a surface of the substrate and has a receiving end. The spot size converter includes a concave mirror and a curved mirror. The concave mirror and the curved mirror are opposite to each other and have a common focus. The concave mirror is arranged to refl...